1085191807 has 6 divisors (see below), whose sum is σ = 1240318824. Its totient is φ = 930089700.

The previous prime is 1085191777. The next prime is 1085191853. The reversal of 1085191807 is 7081915801.

It is not a de Polignac number, because 1085191807 - 2¹¹ = 1085189759 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1085191807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1085191867) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 80932 + ... + 93382.

It is an arithmetic number, because the mean of its divisors is an integer number (206719804).

Almost surely, 2^1085191807 is an apocalyptic number.

1085191807 is a deficient number, since it is larger than the sum of its proper divisors (155127017).

1085191807 is an frugal number, since it uses more digits than its factorization.

1085191807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24909 (or 12458 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 40.

The square root of 1085191807 is about 32942.2495740652. The cubic root of 1085191807 is about 1027.6269896700.

It can be divided in two parts, 108 and 5191807, that added together give a palindrome (5191915).

The spelling of 1085191807 in words is "one billion, eighty-five million, one hundred ninety-one thousand, eight hundred seven".